Mahabharata 1.187.16

आश्वासयामास च तं कुन्तीपुत्रं युधिष्ठिरम्प्रतिजज्ञे च राज्याय द्रुपदो वदतां वरः

āśvāsayāmāsa ca taṃ kuntīputraṃ yudhiṣṭhirampratijajñe ca rājyāya drupado vadatāṃ varaḥ

Our plain-language meaning of this verse is waiting for scholar review.